<script setup lang='ts'>
import { ref } from 'vue'
import type { BannerItem } from '@/types/home'

const activeIndex = ref(0)

// 当 swiper 下标发生变化时触发
const onChange: UniHelper.SwiperOnChange = (ev) => {
  // ! 非空断言，主观上排除掉空值情况
  activeIndex.value = ev.detail!.current
}

// 定义 props 接收
defineProps<{
  list: BannerItem[]
}>()
</script>

<template>
  <view class='carousel'>
    <swiper :circular='true' :autoplay='false' :interval='3000' @change='onChange'>
      <swiper-item v-for='item in list' :key='item.id'>
        <view  class='navigator'>
          <navigator url='/pages/index/index' hover-class='none' class='navigator'>
            <image mode='aspectFill' class='image' :src='item.url'></image>
          </navigator>
        </view>

      </swiper-item>
    </swiper>
    <!-- 指示点 -->
    <view class='indicator'>
      <text
        v-for='(item, index) in list'
        :key='item.id'
        class='dot'
        :class='{ active: index === activeIndex }'
      ></text>
    </view>
  </view>
</template>

<style lang='scss'>
/* 轮播图 */
.carousel {
  height: 280rpx;
  position: relative;
  overflow: hidden;
  transform: translateY(0);
  background-color: #efefef;

  .indicator {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 16rpx;
    display: flex;
    justify-content: center;

    .dot {
      width: 30rpx;
      height: 6rpx;
      margin: 0 8rpx;
      border-radius: 6rpx;
      background-color: rgba(255, 255, 255, 0.4);
    }

    .active {
      background-color: #fff;
    }
  }

  .navigator,
  .image {
    width: 100%;
    height: 100%;
  }
}
</style>
